Businesses across Malaysia are taking part in Internet Blackout Day to protest against a controversial new law regulating online expression.

Section 114A came into force two weeks ago and broadens the scope of who can be held responsible for content published online.

Under the Act, everyone from individuals to those who administer and run online forums, blogs and hosting services can now be held liable for content published through their services, even if it is done anonymously. Any business premises which give free Wi-Fi access to customers could also be affected.

Daniel CerVentus, a web producer, said more than 60 business, including his own, have blocked their sites in protest at the changes.

"The community feels very strongly about this Act because essentially, the onus is on the owner of the site," Mr CerVentus said. "So it's guilty until proven innocent which is really against freedom of speech in general."

It is the first time that Malaysia has held an Internet Blackout Day and the concept has been adapted from similar protests in support of internet freedom in the United States and New Zealand.Internet users who visit participating websites will see a pop-up window which contains the message of the campaign. Many individual web users have changed online profile pictures and avatars to show protest messages.

The Centre for Independent Journalism (CIJ) said it hopes the action will urge Malaysia's government to withdraw the amendment.